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25.20 The insulated conductors of the supply cord for type Y attachment and type Z
6 G; f H1 O) f0 i5 Z5 W5 G; battachment shall be additionally insulated from accessible metal parts by basic insulation) g: y; e- b- F
for class 0 appliances, class 0I appliances and class I appliances, and by supplementary0 \( C3 b$ Q6 ^, M5 p$ x! R
insulation for class II appliances. This insulation may be provided by the sheath of the
$ |: o1 y+ h7 esupply cord or by other means.+ y, ~9 @1 W! a. d3 v% G
Compliance is checked by inspection and by the relevant tests.
* r6 }& q3 r: p/ M! D' T/ U: C各位师兄,我对这点一直很疑惑,大家能发表下自己的理解吗?我的理解是如下:
1 _5 J% A4 W7 D" f' o- t: }随便举个例子(烤箱),电源线进去不是有一段剥掉外表皮的一截线吗?那个就应该是insulated conductors of the supply cord,不知道我理解的对吗?如果是这样的话,那剥掉外皮的那段就不能碰到接地金属外壳了(class I), 而需要再加一层基本绝缘才能符合上面所说?请问大家我理解的对吗?+ L5 H, {1 f+ O+ n" F3 k
如果是这样的话,我又有个疑惑:既然剥掉外皮的电源线不能接触接地的外壳,那我们一般所指的internal wire怎么就可以直接接触带接地的外壳呢?
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